The Beta 3 version of Flex 2 has just been released over at Adobe labs. If you aren't familiar with Flex, you can read my overview at Read/WriteWeb or check out the labs site at Adobe for more information. For those who looked at Flex in the past and were put off by the price tag, it's worth noting that Flex 2 is free. You can't get the builder for free, but Flex 2 doesn't require a server and the SDK is available for free from Adobe.